Trolley.



No. 723,646. PATENTED MAR. 24, 1903.

' H. H. BRYANT & J. B. MGGAW.

TROLLEY. f APPLIUATION FILED NOV. 26, 1902.

. N0 MODEL.

"H "24;..|nmulullllllnlnnmml Illlllllll a ga UNIT -D STATES PAT T Q -FFIQE.

HARRY 11. BRYANT, or ALLEGHENY, AND JOHN B. McGAW, or PI'lTSBURG, PENNSYLVANIA, ASSIGNORS or ONE-THIRD TO OLIVER A. MAOVAY, on

PITTSBURG, PENNSYLVANIA.

TROLLEY.

SPECIFICATION formiilgpart of Letters Patent No. 723,646, dated. March 24, 1903. Application filed November 26, 1902. Serial No. 132,884. (No model.)

To all whom it may concern:

Be it known that we, HARRY H. BRYANT,I6- siding at Allegheny, and JOHN B. MCGAW, residing atPittsburg,in the county of Allegheny and State of Pennsylvania, citizens of the United States of America, have invented certain new and useful Improvements in Trol leys, of which the following is a specification, reference being had therein to the accompa- |o nying drawings.

This invention relates to certain new and useful improvements in trolleys adapted particularly for use in connection with overhead trolley-lines; and the primary object of the invention is to provide means for maintaining the trolley in contact with the trolley-wire under ordinary conditions and at least to reduoe to a minimum the danger of the trolley accidentally leaving the wire.

Briefly described, the invention comprises a pair of spring-held guard-disks mounted one at each side of the trolley-wheel and each provided with a guard pron g or fingerprojecting upwardly above the rim of the trolley-wheel.

These disks are independently mounted and held by separate springs, whereby they may.

move independentlyior in. unison. .Means is also provided whereby the trolley may be reversed without destroying the function of the 0 disks.

All of the above construction will be hereinafter more specifically described and then particularly pointed outin the appended claim, and in describing the invention in de- 3 5 tail reference will be had to the accompany;

ing drawings, forming a partof this specification, and wherein like numerals of reference will be employed for designating like parts throughout the several views,in which 4o Figure 1 is a side elevation showing the po- I sition of the trolley when in engagement with the trolley-wire,"-the stem or shank of the harp being broken away. Fig. 2 is a central vertical sectional view of the same. Fig. 3 is a front elevation thereof. Fig. 4 is an edge viewof one of the spring-held disks detached, and Fig. 5 is a detail side elevation of the same.

. In connection with our invention it is to be noted that we may take the ordinary trolleyo wheel and harp as generally employed and readily apply our improvements thereto, and therefore in the present illustration we have shownthe harp 1 of the ordinary form of construction, the wheel axle or shaft 2 being se- 5'5 cured therein by means of cotter-pins or keys 3, extending through the upper ends of the harp, which is the usual practice. At each side of the trolley-wheel 4 we mount on the axle or shaft 2 for free rotation thereon disks 6o 5, eachrprovidedwith an upwardly-extending prong or finger 6,which prongs or fingers for1n' projections or guards to prevent the accidental displacement of the wheel from the trolley-wire. These projections or guards are 6 5 held normally in the upright position by means of springs 7, one for each disk, these springs at their respective ends'being connected to small screw-eyes 8 and 9, carried by the disks and by the harp, respectively. A convenient method of securing these screweyes in position has been found to be by tapipinga small hole in the disks andin the harp,

threading the same, and threading the shank of the screw therein, and we prefer to provide the disks with tap-holes at opposite sides of their peripheries, as by this means it will be observed that in caseit shouldbe desired to reverse the trolleyitwould simply require the changing of the screw-eyes 8 over onto the opposite side of thedisk and the operation of the latter would remain the same. The disks on their inner faces are preferably chamfered off to fit neatly the sides of the trolley-wheel, thus allowing the inner faces of the guards 6 at their lower ends to overlie the rim of the trolley-wheel slightly, as shown atlO, so that the trolley-wire as it leaves the wheel engages this face and is prevented from passing over the side of the wheel. As the guards or fin- 9o gers engage overhead switches or crossovers they are forced rearwardly, the springs 7 eX- pandin g, and as soon as the obstacle is passed these springs instantly return the guard s' to their upright position to prevent the wheel from leaving the wire.

Attention is directed to the fact that the disks are niovable independently of one another, so that in event only one of the guards. is engaged with an obstruction the disk carrying the other guard will remain in its normal position. This we have found to be a very desirable feature, especially, in round: ing curves and the like, as should the trolley be-so positioned as to throw the wire against one of the guards and perhaps depress the same the other guard remains elevated and in the guarding position, It is also to be noted that the car may back with perfect safety without removing the trolley from the Wire, as the disks rotate freely in either direction.

In the practice of the invention it will be observed that various changes maybe made in the details of construction Without departing from the general spirit of the invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

having bifurcated arms, a shaft connecting said arms, and a wheel mounted on said shaft, of a pair of guard-disks mounted on said shaft and between said arms, one at each side of the wheel, a spring connected to each disk and to a point within the bifurcation of the harp, an integral prong or finger carried by each disk and having its outer face in the same vertical plane with said disk, the inner face of said prong or finger slightly overlying said Wheel, and means for reversing said trolley, substantially as described.

In testimony-whereof we affix our signatures in the presence of two witnesses.

HARRY H. BRYANT. JOHN B. MOGAW. W'itnesses H. OQEVERT, A. M. WILsoN. 

